The JB4 tuner for MINI B38, B46 and B48 engines delivers real-world gains - up to 40hp at the wheels on stock B48 units. Works straight out of the box on F56 Cooper S, F57 JCW, F60 Countryman ALL4 and F54 Clubman.
Plug-and-play fit; no ECU flash, no VIN lock, no dealer visit
8 preloaded maps including E85, launch control and boost-by-gear
JB4PRO app via Bluetooth: log, adjust, update firmware, read/clear faults
Retains all factory safety systems, driving modes and cruise control
